2021 ST

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5333442000
Semi-major axis (a)2.0460943000 AU
Inclination (i)0.17347000°
Long. of Asc. Node (Ω)213.53419000°
Arg. of Perihelion (ω)192.21747000°
Mean Anomaly (M)138.59683000°
Mean Motion (n)0.3367562100°/day
Perihelion dist (q)0.95482180 AU
Aphelion dist (Q)3.13736680 AU
Orbital Period2.92676910 yr
Physical Parameters
H (abs. magnitude)25.99
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.660″
Uncertainty6
Orbit TypeApollo
MOID0.000907 AU
Observations Used91
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-10-07
Observations (95)
Date Type RA Dec Mag Band Observatory
2021-10-01 21:02:38 C 00 23 23.88 +05 30 00.4 q L47
2021-10-01 21:04:07 C 00 23 24.74 +05 30 00.1 V 595
2021-10-01 21:05:13 C 00 23 27.83 +05 29 42.2 V Z80
2021-10-01 21:11:54 C 00 23 33.94 +05 30 29.7 V Z80
2021-10-01 21:13:37 C 00 23 33.80 +05 31 18.3 q L47
2021-10-01 21:17:16 C 00 23 36.60 +05 31 33.6 V 595
2021-10-01 21:18:34 C 00 23 40.06 +05 31 17.0 V Z80
2021-10-02 10:02:24 C 00 37 00.750 +07 12 01.02 V T12
2021-10-02 10:03:05 C 00 37 01.474 +07 12 06.72 V T12
2021-10-02 10:03:31 C 00 37 01.930 +07 12 10.38 V T12
2021-10-02 10:05:56 C 00 37 04.487 +07 12 30.47 V T12
2021-10-02 19:16:09 C 00 48 41.07 +08 30 52.5 q L47
2021-10-02 19:58:28 C 00 49 35.47 +08 37 34.2 q L47
2021-10-03 06:00:01 C 01 04 00.60 +10 19 16.0 V 703
2021-10-03 06:05:25 C 01 04 08.93 +10 20 16.7 V V00
2021-10-03 06:07:39 C 01 04 11.85 +10 20 38.0 V 703
2021-10-03 06:13:12 C 01 04 20.36 +10 21 40.2 V V00
2021-10-03 06:20:59 C 01 04 31.86 +10 23 04.3 V V00
2021-10-03 06:26:55 C 01 04 40.23 +10 24 05.2 V 703
2021-10-03 06:34:32 C 01 04 51.41 +10 25 26.9 V 703
2021-10-03 12:07:56 C 01 13 29.54 +11 26 12.2 o 691
2021-10-03 12:13:15 C 01 13 38.41 +11 27 11.3 o 691
2021-10-03 12:18:35 C 01 13 47.27 +11 28 10.0 o 691
2021-10-03 20:50:51 C 01 30 06.23 +13 07 52.1 V Z80
2021-10-03 20:59:11 C 01 30 22.14 +13 09 37.4 V Z80
2021-10-03 21:07:31 C 01 30 38.15 +13 11 22.7 V Z80
2021-10-04 22:17:24 C 02 30 32.54 +18 51 19.4 V B49
2021-10-04 22:21:55 C 02 30 44.86 +18 52 23.9 V B49
2021-10-04 22:26:27 C 02 30 57.28 +18 53 29.1 V B49
2021-10-05 11:29:49 C 03 10 22.099 +21 53 20.58 V T12
2021-10-05 11:30:34 C 03 10 24.406 +21 53 30.29 V T12
2021-10-05 11:30:59 C 03 10 25.650 +21 53 35.42 V T12
2021-10-05 11:32:24 C 03 10 30.058 +21 53 53.94 V T12
2021-10-05 11:35:04 C 03 10 38.249 +21 54 28.25 V T12
2021-10-05 11:35:44 C 03 10 40.298 +21 54 36.86 V T12
2021-10-05 22:25:54 C 03 47 17.67 +23 53 36.4 V Z80
2021-10-05 22:38:53 C 03 48 01.98 +23 55 55.8 V Z80
2021-10-05 22:50:15 C 03 48 41.07 +23 57 55.1 V J95
2021-10-05 22:52:11 C 03 48 47.72 +23 58 16.0 V J95
2021-10-05 22:54:07 C 03 48 54.28 +23 58 36.1 V J95
2021-10-05 22:56:01 C 03 49 00.77 +23 58 56.7 V J95
2021-10-05 22:56:21 C 03 49 01.66 +23 59 01.7 V Z80
2021-10-07 14:27:14 C 06 00 10.621 +26 38 39.01 V T12
2021-10-07 14:27:53 C 06 00 12.406 +26 38 38.09 V T12
2021-10-07 14:28:23 C 06 00 13.758 +26 38 37.38 V T12